SONAR suggestion - log exceptions, don't print stack traces

Change-Id: I4814a0662912706df005972d44c48a7db39ecd50
diff --git a/apps/artemis/src/main/java/org/onosproject/artemis/impl/moas/MoasServerHandler.java b/apps/artemis/src/main/java/org/onosproject/artemis/impl/moas/MoasServerHandler.java
index d140416..6a6a0ab 100644
--- a/apps/artemis/src/main/java/org/onosproject/artemis/impl/moas/MoasServerHandler.java
+++ b/apps/artemis/src/main/java/org/onosproject/artemis/impl/moas/MoasServerHandler.java
@@ -22,7 +22,6 @@
 import io.netty.channel.ChannelHandler.Sharable;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelInboundHandlerAdapter;
-import org.apache.commons.lang.exception.ExceptionUtils;
 import org.onlab.packet.IpAddress;
 import org.onosproject.artemis.impl.objects.ArtemisMessage;
 import org.slf4j.Logger;
@@ -77,8 +76,7 @@
 
     @Override
     public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
-        log.error(ExceptionUtils.getFullStackTrace(cause));
-        cause.printStackTrace();
+        log.error("exceptionCaught()", cause);
         ctx.close();
     }